Boxing Pay

I was wondering if anyone knew any information on the pay for undercard fighters on a big boxing card. Something like Mayweather/DLH or a smaller one like Jones/Trinidad. I always hear about the top pay on these cards, but not often the bottom like is complained about in mma. Is it substantially higher for not being as adveratised as say a UFC undercard fight. Not trying to bitch about pay, not really any of my business, would be interesting to see though.